Using coffee grounds for cellulite is actually a very old technique. It is not the coffee that is particularly important but the caffeine that does the work. Caffeine works by stimulating circulation in the problem areas which stops the build up of fat cells. Breaking up these fat cells then causes the reduction in cellulite. To do this mix some coffee grounds with body lotion and apply to the specific area. Leave on for about 30 minutes and then wipe the area with a damp cloth.